Right click on project–> add new item
Select data from the menu
Select ADO.Net Entity Data Model
Enter a name
Click add

Follow the prompts and to map to an existing database (ex. use a connection string)

3. Use dbContext code generation

On the design surface of the edmx model:

Right click–> add code generation item
Select code from the menu
Select ADO.Net dbContext generator
Enter a name (helps if this is the same as your model name)
Click add

This will create two new items in your project
[yourname].tt
Which will contain simple POCO classes for each entity in your model
[yourname].tt
Which will generate a drived dbContext to use for getting and changing data